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Yakima Basin Total Water Supply Available March 2005 Presented by: Quentin Kreuter River Operator Chris Lynch Civil Engineer, PE Kate Puckett River Ops.

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Presentation on theme: "Yakima Basin Total Water Supply Available March 2005 Presented by: Quentin Kreuter River Operator Chris Lynch Civil Engineer, PE Kate Puckett River Ops."— Presentation transcript:

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2 Yakima Basin Total Water Supply Available March 2005 Presented by: Quentin Kreuter River Operator Chris Lynch Civil Engineer, PE Kate Puckett River Ops Supervisor David Murillo YFO Manager

3 Yakima Basin March 2005 Current Hydrologic Conditions System Status http://www.usbr.gov/pn/hydromet/yakima/yakstats.txt Extended forecast http://www.cpc.ncep.noaa.gov/index.html

4 Season’s Summary 106% average (1981-2000) System storage El Nino conditions – warm and dry Dry Oct – Feb, 53% of average precipitation Extremely poor snowpack, 22% average 34% prorationing estimate Yakima Basin March 2005

5 Antecedent Hydrologic Conditions Precipitation Snow Water Equivalent Unregulated Parker Flow Observed Parker Flow Observed System Canal Diversions Reservoir System Flow Reservoir System Storage Yakima Basin, March 2005

6 87 %47 %58 % Oct-Feb: 89.4 in. 53 % of Avg. 74 %17 %

7 87 %47 %58 % Oct-Feb: 89.4 in. 53 % of Avg. 74 %17 %

8 87 %47 %58 %74 %17 % Oct-Feb: 89.4 in. 53 % of Avg.

9 87 %47 %58 % Oct-Feb: 89.4 in. 53 % of Avg. 74 %17 %

10 Average based on the greater of 1971-2000 or period of record. Totals derived from 8 Yakima forecast sites Cayuse, Corral, Stampede, Olallie, Fish, Bumping, Domerie, Tunnel Avenue Yakima Basin 2005 Snow Water 61% NRCS SWE North South Dec 1 21% 31% Jan 1 31% 37% Feb 1 20% 25% Mar 1 21% 22%

11 Average based on the greater of 1971-2000 or period of record. Totals derived from 8 Yakima forecast sites Cayuse, Corral, Stampede, Olallie, Fish, Bumping, Domerie, Tunnel Avenue Yakima Basin 2005 Snow Water Some historic data estimated for Corral, Cayuse, Olallie, & Fish

12 Average based on the greater of 1971-2000 or period of record. Totals derived from 8 Yakima forecast sites Cayuse, Corral, Stampede, Olallie, Fish, Bumping, Domerie, Tunnel Avenue Yakima Basin 2005 Snow Water 61% NRCS SWE North South Dec 1 21% 31% Jan 1 31% 37% Feb 1 20% 25% Mar 1 21% 22%

13 Average based on the greater of 1971-2000 or period of record. Totals derived from 8 Yakima forecast sites Cayuse, Corral, Stampede, Olallie, Fish, Bumping, Domerie, Tunnel Avenue Yakima Basin 2005 Snow Water 93% NRCS SWE North South Dec 1 21% 31% Jan 1 31% 37% Feb 1 20% 25% Mar 1 21% 22%

14 2005 System Unregulated Flow Volume Oct-Feb 616 KAF, 113 % Avg.

15 2005 System Observed Flow Volume Oct-Feb 219 KAF, 89 % Avg.

16 2005 Parker Unregulated Flow Volume Oct-Feb 1045 KAF, 93 % Avg.

17 2005 Parker Observed Flow Volume Oct-Feb 558 KAF, 74 % Avg.

18 Yakima Basin System Storage 2005 Yakima System Storage March 1, 689 KAF, 106 % Avg.

19 Yakima Basin System Storage 2005 Yakima System Storage March 1, 689 KAF, 106 % Avg.

20 Yakima Basin System Storage 2005 Yakima System Storage March 1, 689 KAF, 106 % Avg.

21 Yakima Basin System Storage 2005 Yakima System Storage March 1, 689 KAF, 106 % Avg.

22 Yakima System Canal Flow Oct: 97 KAF, 130 % Average

23 Yakima Basin, River Operations Meeting, March 2005 Climate Prediction Center Outlook PeriodTemperaturePrecipitation Mar-May Above Average Dry Jun-Aug Warm/Equal Chance Equal Chance “ Synopsis: A transition from weak warm-episode (El Niño) conditions to ENSO-neutral conditions is expected to continue during the next three months.” CPC March 3, 2005

24 Current Drought Condition Current Drought Condition (click on this text)

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27 Summary  Reservoir Storage near average  El Nino winter  Dry October - February  Extremely low snowpack  Reduced fish flow targets  34% Prorationing  Transitioning to Nino Neutral Spring/Summer  Let it RAIN Yakima Basin March 2005, WY 2005

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31 Not Used Preliminary

32 Not Used Preliminary

33 Yakima Basin River Operations Meeting December 2004 Next meeting Adjourn.

34 Yakima Basin NRP Explanation Agreement Proportional Runoff Available –NRP=Natural Flow / Total Entitlements Natural Flow = Whatever is available with no special releases from Storage Total Entitlements = Normal Proratable + Non-Proratable water summed for all Districts

35 Yakima Basin NRP Explanation Agreement Proportional Distribution –NRPd=NRP * Entitlement Entitlement = Normal Proratable + Non-Proratable for this District

36 Yakima Basin NRP Explanation Agreement Exceeding NRPd –Districts can take more than NRPd –Charged against their total 2001 water bucket

37 Yakima Basin NRP Hypothetical Example (values in cfs) Natural water = 3600 Entitlement S= 5000 NRP = 72 % District Entitlement = 1000 NRPd =.72 * 1000 = 720 Actual Diversion = 740 Water bucket charge under NRP = 20 Charge if on prorationing = 740

38 Yakima Basin NRP Benefits ¯Conserves storage ¯Delays Storage Control Date ¯Improves water supply ªDuring NRP, all available water is distributed and may be more than prorated amounts (1994) ªPreserves storage water (2001) ¯Improves prorationing ¯Preserves individual district water buckets

39 Yakima Basin NRP Benefits ¯Storage Conserved in April 2001 ªApril NRP use 87,000 AF ªApril Entitlements*114,000 AF ªWater Saved 27,000 AF *With 28% prorationing

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